Finally got some numbers back from the Dyno comparing the 2 known providers of Tunes for the N52
DynoJet Results
Kassel Performance 253.15 Whp and 291.12 estimated at the crank.
Epic Motorsports 248.74 Whp and 286.05 estimated at the crank.
Through the mid range the Kassel has about a 10hp gain but less above 6300 RPMs. I think with a little more time the Kassel could get to 255.00
My Takeaway is if you are racing then the Kassel is a better bet, but for the street the Epic is less stress on the engine.
List of Modifications:
- Headers
- Straight pipe exhaust to Supersprint Muffler
- Dinan larger throttle Body
- AFE Cold Air intake